The Maple Mini, such as it currently exists, is a Chinese version of a discontinued Arduino-like STM32 module based on the STM32F103CBT6. For the sake of brevity, I will henceforth refer to those Chinese modules as “Maple Mini” but it should be clear that I’m not talking about the original module. Anyway, I’m more likely to just call it “the module”.
In this section, I’ll detail its important electrical features (everything you need to know so you don’t blow it up), how to program it, and how to make prototype boards around it. Let’s get to it.